Help with this question

Answer:

u>36

Step-by-step explanation:

u>36

9×4=36

so u>36

1) a. 6     b. 5 - i     c. 1 + 4i    d.  -0.5 + 2.5i

2) x^3 - (7 - 3i)x^2 + (14 - 6i)x - (8 - 24i).

(1)
(a) 2 + 3i + 4 - 3i = 6 + 0i = 6

(b) (3 + 2i)(1 - i) = 3 + 2i - 3i - 2i^2 = 3 - i + 2 = 5 - i

(c) 2 + 3i - (1 - i) = 2 + 3i - 1 + i = 1 + 4i

(d) 2+3i / 1-i = (2+3i)(1+i) / (1-i)(1+i) = (2+2i+3i+3i^2) / (1-i+i-i^2) = (2+5i-3) / (1+1) = (-1+5i) / 2 = -0.5 + 2.5i

(2)

If x = 1 – 3i, x = 2, and x = 4 are roots of f(x),

then we can write f(x) as:
f(x) = (x - (1 - 3i))(x - 2)(x - 4)

Multiplying these factors out, we get:

f(x) = (x^2 - (1 - 3i)x - 2x + 2(1 - 3i))(x - 4)
f(x) = (x^2 - (3 - 3i)x + 2 - 6i)(x - 4)
f(x) = x^3 - (7 - 3i)x^2 + (14 - 6i)x - (8 - 24i)
So, the polynomial f(x) is x^3 - (7 - 3i)x^2 + (14 - 6i)x - (8 - 24i).

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Using Poisson distribution, the probability of each scenario is attached below.

(a) The probability of receiving 0 complaints in a 3-day period is given by the Poisson distribution:

P(X=0) = (λ^x * e^(-λ)) / x!

where λ is the expected number of complaints per day, and x is the number of complaints in the time period of interest.

In this case, λ = 1.1 complaints per day, and x = 0 complaints in 3 days.

P(X=0) = (1.1^0 * e^(-1.1 * 3)) / 0! = 0.037

So the probability of receiving 0 complaints in a 3-day period is 3.7%.

(b) The probability of receiving 1 complaint in a 3-day period is:

P(X=1) = (1.1^1 * e^(-1.1 * 3)) / 1! = 0.041

So the probability of receiving 1 complaint in a 3-day period is 4.1%.

(c) The probability of receiving 2 complaints in a 3-day period is:

P(X=2) = (1.1^2 * e^(-1.1 * 3)) / 2! = 0.022

So the probability of receiving 2 complaints in a 3-day period is 2.2%.

(d) The probability of receiving 3 complaints in a 3-day period is:

P(X=3) = (1.1^3 * e^(-1.1 * 3)) / 3! = 0.008

So the probability of receiving 3 complaints in a 3-day period is 0.8%.

(e) The probability of receiving 4 complaints in a 3-day period is:

P(X=4) = (1.1^4 * e^(-1.1 * 3)) / 4! = 0.0022

So the probability of receiving 4 complaints in a 3-day period is 0.22%.

(f) The probability of receiving less than or equal to 4 complaints in a 3-day period is:

P(X ≤ 4) = P(X=0) + P(X=1) + P(X=2) + P(X=3) + P(X=4) = 0.1102

So the probability of receiving less than or equal to 4 complaints in a 3-day period is 11.02%.

(g) The probability of receiving more than 4 complaints in a 3-day period is:

P(X > 4) = 1 - P(X ≤ 4) = 1 - 0.1102 = 0.8898

So the probability of receiving more than 4 complaints in a 3-day period is 88.98%.

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Simplified each expression of  (x²-25x-24)/(6x+2x²)*(5x²)/(8-x) is (-5x(x-24)(x-1))/(2(3+x)(x-8)).

To simplify the expression (x²-25x-24)/(6x+2x²)*(5x²)/(8-x), we need to factor the polynomials in the numerator and denominator and then cancel out any common factors.

First, let's factor the polynomials:

(x²-25x-24) = (x-24)(x-1)
(6x+2x²) = 2x(3+x)
(5x²) = 5x*x
(8-x) = -(x-8)

Now, let's plug these back into the expression and cancel out any common factors:

((x-24)(x-1))/(2x(3+x))*(5x*x)/(-(x-8))

= ((x-24)(x-1)*5x*x)/(2x(3+x)*-(x-8))

= ((x-24)(x-1)*5x)/(2(3+x)*-(x-8))

= (5x(x-24)(x-1))/(-2(3+x)(x-8))

Finally, let's simplify the expression by multiplying the constants:

= (-5x(x-24)(x-1))/(2(3+x)(x-8))

So the simplified expression is (-5x(x-24)(x-1))/(2(3+x)(x-8)).

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Answer:

28 7/12

Step-by-step explanation:

Answer:

Let's assume that Mia's present age is x.

According to the problem, Rosie is 6 years older than Mia, so Rosie's present age is x + 6.

In 4 years, Mia's age will be x + 4, and Rosie's age will be (x + 6) + 4 = x + 10.

The problem also states that Rosie's age in 4 years will be three times Mia's present age, so we can write the equation:

x + 10 = 3x

Simplifying this equation, we can subtract x from both sides to get:

10 = 2x

Dividing both sides by 2, we get:

x = 5

Therefore, Mia is currently 5 years old. To check, we can verify that in 4 years, Rosie will be three times Mia's age:

Rosie's age in 4 years = (5 + 6) + 4 = 15

Mia's age in 4 years = 5 + 4 = 9

Rosie's age in 4 years is indeed three times Mia's age, so our solution is correct.

Answer:

[tex]y^{6} z^{6}[/tex]

Step-by-step explanation:

(yz)^6 is the same as:

yz * yz * yz * yz * yz * yz

which is the same as

[tex]y^{6} z^{6}[/tex]

For both march and April the precipitation is [tex](4\frac{7}{16})[/tex] inches below the average.

The term "average" refers to a central value that represents a set of numbers. There are different types of averages, such as the mean, mode and median.

Let's denote the average precipitation as "a".

In March, the precipitation was [tex]6\frac{1}{2}[/tex] inches less than the average. This can be expressed as:

March precipitation = [tex]a-6\frac{1}{2}[/tex]

In April, the precipitation was [tex]2\frac{3}{8}[/tex] inches less than the average. This can be expressed as:

April precipitation = [tex]a-2\frac{3}{8}[/tex]

To find the total precipitation below average for both March and April, we can add the two expressions:

March precipitation + April precipitation = [tex](a-6\frac{1}{2})[/tex] + [tex](a-2\frac{3}{8})[/tex]

Simplifying the expression, we get:

March precipitation + April precipitation = [tex](2a-8\frac{7}{8})[/tex]

So, after dividing by 2 in result the value will be, [tex](a-4\frac{7}{16})[/tex]

Therefore, the total precipitation below average for both March and April was [tex](4\frac{7}{16})[/tex] inches.

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`u−2u2u0u3 = u^3`

(a) 1 / 34 * 4 = 4 / 34

(b) 6y * (1 / (53xy2))3 = 6y / 53xy2

(c) x * (1 / 9y) * (1 / 14x2) * (1 / (x−8)) = x / (9y * 14x2 * (x−8))

(d) (u−2 * u2) / (u0 * u3) = u−4 / u3
(a) Rewrite the given expression without negative exponents and simplify:(a)- (34)- 4Let us first use the law of exponents that says `(a^m)^n = a^(m*n)`The negative exponent `−4` means the denominator, so we can move the base `3` to the denominator and change the exponent to `+4`.Thus, `(a)−(34)−4 = a*(3^4) = 81a`Therefore, `(a)- (34)- 4 = 81a`(b) Rewrite the given expression without negative exponents and simplify:(b)(6y-5/3xy2)3Let us first use the law of exponents that says `(a^m)^n = a^(m*n)`We have to remove the negative exponent from `y^-5`, we can write it as `1/y^5`.Thus, `(6y-5/3xy2)3 = 6^3 * y^-15 * x^3 * y^6`Moving the base `y` with the negative exponent to the denominator and change the exponent to `+15`.Therefore, `(6y-5/3xy2)3 = 216x^3/ y^9`(c) Rewrite the given expression without negative exponents and simplify:(c) x-9y-14x2x-8We can rewrite `x^-9` as `1/x^9` and `x^-8` as `1/x^8`. Therefore, we get `(1/x^9 * y^-14 * x^2 * 1/x^8)`.Simplifying the above expression we get `(y^-14/x^15)`Therefore, `x-9y-14x2x-8 = y^-14/x^15` (d) Rewrite the given expression without negative exponents and simplify:(d) u−2u2u0u3Here we can observe that `u^0 = 1`. Hence, `u−2u2u0u3 = u^-2*u^2*1*u^3`We can simplify the expression by multiplying the coefficients and adding the exponents. Thus, `u^-2*u^2*1*u^3 = u^(2-2+3) = u^3`Therefore, `u−2u2u0u3 = u^3`

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Answer: 8

Step-by-step explanation:

2*3= 6
[tex]\frac{2}{3}[/tex]*3= 2

Answer:

Step-by-step explanation: point form: (4,1)

x=4 , y=1

They are not the best factors to use because 12 cannot be simplified further into a perfect square. It is better to factor 48 into perfect squares and simplify each square root separately.

Factors can be classified as prime or composite. A prime factor is a factor that is a prime number, meaning it is only divisible by 1 and itself. For example, the prime factors of 12 are 2 and 3. A composite factor is a factor that is not a prime number, meaning it has more than two factors. For example, 4, 6, and 12 are composite factors of 12.

Let's examine the factors 4 and 12 to see if they can be used to simplify the square root of 48:

4 is a perfect square, and its square root is 2. However, 12 is not a perfect square, and its square root cannot be simplified further.

We can write 48 as 4 x 12, so the square root of 48 can be simplified as the product of the square root of 4 and the square root of 12, or 2√12.

However, this is not the simplest form of the square root of 48. We can further simplify √12 by factoring it into perfect squares: √12 = √(4 x 3) = √4 x √3 = 2√3.

Therefore, the simplest form of the square root of 48 is 2√3, not 2√12.

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Answer:

(x - 6)(3x + 15) + 95

Step-by-step explanation:

Here's the long division of (3x^2 - 3x + 5) ÷ (x - 6):

   3x + 15

 --------------

x - 6 | 3x^2 - 3x + 5

- (3x^2 - 18x)

--------------

15x + 5

- (15x - 90)

------------

95

Therefore, the quotient is 3x + 15, and the remainder is 95.

The quotient represents the result of the division of the polynomial (3x^2 - 3x + 5) by the divisor (x - 6). In particular, the quotient 3x + 15 represents the linear polynomial that, when multiplied by the divisor x - 6, gives the dividend 3x^2 - 3x + 5.

In other words, we have:

(3x^2 - 3x + 5) = (x - 6)(3x + 15) + 95

The remainder 95 indicates that the division is not exact, and that there is a "leftover" term of 95 when we try to divide the polynomial (3x^2 - 3x + 5) by (x - 6).

Answer:

See explanation below

Step-by-step explanation:

S has x-coordinate of 6 => the distance from origin to x-coordinate is 6 units, which is one leg of the right triangle

Pythagorean theorem states that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse.

c^2 = a^2 + b^2

with c = 10, a = 6

10^2 = 6^2 + b^2

b^2 = 100 - 36 = 64

b = √64 = 8

Point S can have 2 y-coordinates, one (+) and one (-) depending on the location of point S, so S can be either (6,8) or (6,-8)

The area of the shaded region is 7πcm²

The space enclosed by the boundary of a plane figure is called its area. The area of a figure is the number of unit squares that cover the surface of a closed figure. Area is measured in square units like cm² and m².

The area of a circle is expressed as πr²

area of the unshaded parts = 2× πr²

=2 (π × 1²)

= 2π cm²

area of the big circle = πr²

= π × 3²

= 9πcm²

area of the shaded part = 9π -2π

= 7π cm²

therefore the area of the shaded part is 7πcm²

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The type of sampling used by the University of Iowa in their investigation of student drinking is C) Cluster sampling.

Cluster sampling is a method where the population is divided into groups, or clusters, and a random sample of these clusters is selected for the study. In the case of the University of Iowa's investigation, the population was the entire student body and the clusters were the different classrooms. By randomly selecting 10 classrooms and interviewing all the students in each of these groups, the University of Iowa was using cluster sampling.

Therefore, the correct answer is  C: cluster sampling.

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The correct answer is B. 2.15m^(2). The estimated body surface area of the person is 2.15m^(2).

To estimate the body surface area of a person, we can use the Mosteller formula:
BSA = square root of [(height in cm x weight in kg)/3600]

Plugging in the given values for height and weight:
BSA = square root of [(166cm x 100kg)/3600]
BSA = square root of 1660000/3600
BSA = square root of 461.11
BSA = 2.15m^(2)

Therefore, the estimated body surface area of the person is 2.15m^(2). Hence, B is the correct answer.

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P(event) represents the probability of an event occurring.

Probability is a branch of mathematics that deals with the study of random events or experiments. It is the measure of the likelihood or chance that a particular event will occur. Probability is expressed as a number between 0 and 1, where 0 means that the event is impossible and 1 means that the event is certain to happen.

An event is a set of outcomes of a random experiment, and the probability of an event is the measure of how likely it is to occur.

Here are some examples:

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The 95% confidence interval is (17.77, 24.97). As $23 is within the limits of the confidence interval, we cannot conclude that the population mean is greater than $23.

The 95% confidence interval can be calculated using the formula:
CI = x ± t(s/√n), where x is the sample mean, t is the t-score for the desired confidence level, s is the sample standard deviation, and n is the sample size.

For a 95% confidence level and a sample size of 50, the t-score is 2.009. Plugging in the given values, we get:

CI = 21.37 ± 2.009(12.67/√50) = 21.37 ± 3.60 = (17.77, 24.97)

Since $23 is within the limits of the 95% confidence interval (17.77, 24.97), we cannot conclude that the population mean is greater than $23.

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The correct answer is C. It is significant at the 5% level.

To determine the statistical significance of the slope coefficient, we need to calculate the t-statistic for the slope coefficient and compare it to the critical value for the desired level of significance.

The t-statistic is calculated as:

t = (slope coefficient - hypothesized value) / standard error of the slope coefficient

In this case, the hypothesized value is 0 (no relationship between x and y) and the standard error of the slope coefficient is 0.43. So the t-statistic is:

t = (0.78 - 0) / 0.43 = 1.81

Now we need to compare this t-statistic to the critical value for the desired level of significance. For a two-tailed test with 202 - 2 = 200 degrees of freedom, the critical values are:

- 1.645 for the 10% level
- 1.96 for the 5% level
- 2.576 for the 1% level

Since the t-statistic (1.81) is greater than the critical value for the 10% level (1.645) but less than the critical value for the 5% level (1.96), we can conclude that the slope coefficient is significant at the 10% level but not at the 5% level. Therefore, the correct answer is B. It is significant at the 10% level.

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The equivalent decimal value for the fraction 13/9 is [tex]1.4\bar{4}[/tex]

Fractions are a way to represent a part of a whole, and they consist of two parts: the numerator and the denominator.

To convert a fraction into a decimal, we need to divide the numerator by the denominator. In the case of 13/9, we can do the following:

13 ÷ 9 = 1.444444...

The result is a decimal that goes on forever without repeating. However, we can use a bar to indicate which digit or group of digits repeats. In this case, the digit "4" repeats, so we can write:

13/9 = [tex]1.4\bar{4}[/tex]

The bar over the digits 4 indicates that they repeat infinitely.

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Complete Question:

For the given fraction 13 /9, Write as a decimal. If necessary, use a bar to indicate which digit or group of digits repeats.

The answer is A: Yes B: Yes C: Yes D: Yes E: Yes F: Yes. Each point is correctly placed on the coordinate plane.

A coordinate plane is a two-dimensional plane consisting of two axes (x and y) which intersect at a point called the origin. The x-axis, which runs horizontally, is referred to as the abscissa and the y-axis, which runs vertically, is referred to as the ordinate. The origin, which is the point of intersection of the two axes, is the point (0, 0).The coordinate plane is also known as the Cartesian plane, named after mathematician René Descartes.

Yes, Point A is located correctly on the coordinate plane at (4, –2). Yes, Point B is located correctly on the coordinate plane at (2 1/2, 2). Yes, Point C is located correctly on the coordinate plane at (2 1/2, –2). Yes, Point D is located correctly on the coordinate plane at (1, 3). Yes, Point E is located correctly on the coordinate plane at (–1, 1). Yes, Point F is located correctly on the coordinate plane at (–2, –2 1/2).

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To find the ground distance traveled by the aircraft, we can use the trigonometric function tangent. The tangent of an angle in a right triangle is equal to the opposite side divided by the adjacent side. In this case, the opposite side is the height of the aircraft (30,000 ft) and the adjacent side is the ground distance traveled (x).
Therefore, we can set up the following equation:
tan10° = 30,000/x

We are given that tan10° = 0.176, so we can substitute that value into the equation:
0.176 = 30,000/x
Next, we can cross-multiply and solve for x:
x = 30,000/0.176
x ≈ 170,455 ft
Finally, we can convert the ground distance traveled from feet to nautical miles using the conversion factor 1 Nm = 6076 ft:
170,455 ft * (1 Nm/6076 ft) ≈ 28.06 Nm
Therefore, the ground distance traveled by the aircraft is approximately 28.06 nautical miles.

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A(t) = $3,600(1.125)t is the function that displays the balance of the account after t years, rounded to four decimal places.

The definition of the word "invest" is to "expend money with the idea of attaining a profit or material consequence by putting it into financial plans, etc." A person is "vested" when they are "secured in their possession or allocated to a person," on the other hand. It can also imply outfitted with a vest, although that is unimportant just now.

A(t) = P(1 + r)t

where:

A(t) represents the balance of the account after t years.

P is the initial investment, $3,600, and r is the growth rate per year.

The number of years is t.

A(t) = $3,600(1 + 0.125)t

A(t) = $3,600(1.125)t

We can take the growth rate and subtract 1 to get the annual growth percentage, which we can then translate to a percentage as follows:

Percentage growth rate = (1.125 - 1) * 100% = 12.5%

So the account grows by approximately 12.5% per year.

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Alex want to subtract 196 from . So here we have to know about basic mathematical calculation.

What is calculation?

Calculation is a mathematical process we take one or more input to get one or more output. For this we uses various operations like Addition , Subtraction, Multiplication, Division, Percentage etc.

In addition we add one or more no to other and get output.

Example : 5 + 4 + 6 = 15

In addition we subtract smaller by the bigger no.

Example : 5 -4 = 1

In Multiplication we multiply two or more number to get output.

Example : 5 x 4 x 6 = 120

In division we divide smaller number by the big one to take output.

Example : 12 / 6 = 2

So , In question, [tex]50^{2} - 48^{2} =196[/tex]

So, My answer is 196.

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Answer: 2 1/5

Step-by-step explanation:

11= 11/1 x 1/5= 11/2= 2 1/5

The number of miles travelled by Juan is 28 miles.

An equation is a mathematical statement that shows that two mathematical expressions are equal.

For example, 3x + 5 = 14 is an equation, in which 3x + 5 and 14 are two expressions separated by an 'equal' sign.

Given that, a taxi fare is given by an expression, F = 2.25+0.20(m-1), where F is the taxi fare and m is the number of miles traveled,

We need to find the number of miles if the taxi fare is $7.65

Put F = 7.65 in equation given to find the value of m,

7.65 = 2.25+0.20(m-1)

5.4 = 0.20(m-1)

m-1 = 5.4 / 0.2

m-1 = 27

m = 28

Hence, the number of miles travelled by Juan is 28 miles.

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a) When the number of chirps per minute, c = 110, then the outdoor temperature is 67.5°F.

b) If outdoor temperature is, f at least 55° F, then 60 chirps we can expect to hear in a minute at that temperature.

c) The graph for linear function, f = (1/4)c + 40, is present above.

d) The cofficient of linear function/ equation represents the slope of linear equation.

A function is a relationship that exists between two variables, where one variable depends on the other.

The linear equation is f = (1/4)c + 40 ----(1)

where, c--> the number of chirps per minute, that the tree cricket makes is linearly dependent on f.

f--> the temperature in Fahrenheit.

a) When number of chirps per minute,c = 110. We have to determine the outdoor temperature in degrees Fahrenheit. Substitute the value c = 110 in equation (1),

=> f = 1/4×110 + 40

=> f = 27.5 + 40

=> f = 67.5

So, required value is 67.5° F.

b) The outdoor temperature is, f at least 55° F, i.e., f = 55° F

Substitute f value in equation (1),

=> 55 = (1/4)c + 40

=> 55 - 40 = (1/4)c

=> (1/4)c = 15

=> c = 4× 15

=> c = 60

c) On the coordinate plane, graph that represents the relationship between the number of chirps, c and the temperature, f is attached in above figure.

d) The cofficient 1/4 in linear equation represents the slope of equation, df/dc that is change in outdoor temperature (°F) per crickets chirp in minutes. Hence, the required cofficient represents slope.

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Complete question:

In places where there are crickets, the outdoor temperature can be predicted by the rate at which crickets chirp. One equation that models the relationship between chirps and outdoor temperature is f = (1/4)c + 40, where c is the number of chirps per minute and f is the temperature in degrees Fahrenheit.

a). Suppose 110 chirps are heard in a minute. According to this model, what is the outdoor temperature?

b) The equation is only a good model of the relationship when the outdoor temperature is at least 55∘F. (Below that temperature, crickets aren't around or inclined to chirp.) How many chirps can we expect to hear in a minute at that temperature?

c) On the coordinate plane, draw a graph that represents the relationship between the number of chirps and the temperature.

d) Explain the cofficient 1/4 in equation tells us about relationship.

The price per can has been lowered by R2, making the standard can cost R7.

A mathematical assertion that establishes the equivalence of two expressions is known as an equation. It is made up of two sides, a left and a right side, separated by the equal sign (=). The equation, which is typically used to determine an unknown variable's value, requires that the values on both sides be equal. Exponents, logarithms, multiplication, division, addition, subtraction, and other mathematical operations can all be used in equations.

given

Let's say that the standard price per can is "x" Rand.

The revised price is (x-2) Rands if the price is decreased by R2.

The issue is that 14 cans are being offered for the customary price of 10 cans. Thus, we can construct the equation:

10x = 14(x-2) (x-2)

After finding x, we obtain:

10x = 14x - 28

-4x = -28

x = 7

The price per can has been lowered by R2, making the standard can cost R7.

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